A new study found that the Tdap booster vaccine provides moderate protection against whooping cough during the first year after vaccination, but its effectiveness wanes to less than 9 percent after four years among teenagers who have received only a newer form of the whooping cough vaccine (acellular pertussis vaccine) as infants and children.
from Top Health News – ScienceDaily http://bit.ly/1NXhItb via Naturally Increase Breast Size At Home
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